Portion of a display screen with an icon



The FIGURE is a front view of the portion of a display screen with an icon showing the new design.

The dot-dash broken lines depict a boundary of a claimed surface of a portion of a display screen and form no part of the claimed design. The broken lines depict unclaimed portions and form no part of the claimed design. 

CLAIM The ornamental design for a portion of a display screen with an icon, as shown and described. 